Yes. Germany is incredibly cheap that way, claiming it's "not worth it due to short summers". Doesn't matter. If you need it only 2-3 months a year, that's still a NEED right there. Especially during 38C days.
I have been impressed staying at hostels that had, what I would call, “suicide windows”.
In Toronto apartments, you have to take invasive action to let the window open more than 10cm.
It is funny people discuss 25°C. We had last week 36°C inside of our office, and a solution from the company? Work from home.